I felt very violated on the MUNI yesterday on my way home from work. The "M" took a long time coming, so it was packed... like squished sardines. Well, the lady standing behind me had a rather large butt. And it kept bumping and resting against mine. I didn't like the feeling because her butt was really hot, and I know it wasn't the bus itself, because the air conditioner was on. So I tried to arch my back forward as much as possible, to maximize the distance between our butts. But the more I pulled my butt forward (to the point my back started to ache), her butt would continue to follow. It wasn't until we got to Castro that half the bus unloaded, and I was able to find a seat.